Draw works brake mechanism



NOV. 28, 1933. HQDGES 1,937,022

DRAW WORKS BRAKE MECHANISM Filed June 14, 1932 Patented Nov. 28, 1933 I I ester he es, Houston, Tex. I Anaheim14,1932. seams-nuts lotiss 'z'z) This-invention relates to draW -Works brake" Whose otherf'end is connected to a depending mechanism and this application 'is a continuaarm 1 2-whichfisf fixed to the brake shaftf8; i i tent of my co-pendin pplication filed Each link 11*is pivotally connected to its corre-' May 19, 1931, under Serial No. 438,455. sponding yoke 6 and arm '12 on horizontal axes An object of the invention is to provide mechand works loosely through a bearing in the cor- 60 anism of the character described sp ially apresponding bracket-3. There are the externally V plicable to the cable winding drum of the draw threaded adjusting, rods 13 threaded through works of well drilling rig but is capable'of genthe respective brackets 4 and having a swivel* eral application for braking purposes. ling connection with the corresponding yokes i Another object of the invention resides in the 7 and through which'said yokes may be adjusted 65 provision of novel means for setting and releasalong said tracks 5. Each adjusting rod 13 is in h brake by h e f w i h a m m equipped with a lock nut'14 whereby the correarea of the braking surface of the brake drum sponding yoke may be fixe'd'at any point of admay be utilized and maximum braking capacity justment.

15 thus obtained; and the invention also compre- A suitable drum as 15 may be mounted in any 70 hends novel means where i the brake may be conventional manner and its ends are provided securely held in set or braking position. with suitable brake surfaces as 16 each of which A further feature of the invention resides in is surrounded by a brake band as 17. One end P o s o of ans for holding the brake band of each band isconnectedto a stationary yoke I 20 out of contact with the opposing brake surface 7. A link 18 is pivotally connected at its forward 75- when the brake is released. end to the yoke 6 and its other end is pivotally,

With the above and other objects in view the connected to the other end of said brake band 1,7. invention has particular relation to certain novel It is obvious that by manipulating the brake features of construction, operation and arrangelever 10 so as to' force theyoke 6 inwardly the .ment of parts, an example of which is given in ends of the brake band will beiforced toward 8 0 7 this specification and illustrated in the accomeach other and said band thus clamped around I Denying d aw ng, whe n: the brake surface 16. The yoke 7. may be ad- Figure 1 ShOWS a ent y side e t n justed so as to tighten up or loosen said'brake of the brake mechanism, and j band in the usual way. When'the lever 10 is Figure 2 shows a plan view of the operating operated inthe other direction, the brake band 85 mechanism. I will be released from the brake surface 16. Referring now more particularly to the draw- When the lever 10 is operated to set the brake, ing wherein like numerals of reference designate as above described, the pivotal connection besimilar parts in each'of the figures the numeral tween the arm 12 and the link 11 will move 'on 1, in the present illustration, indicates the der slightly past center, that is slightlypast the line 90m rick floor and the numeral 2 designates asuitconnecting the axis of the shaft 8 and the .piV- able base plate anchored to the floor and on otal point of connection between the link 11 and which the brake operating mechanism is mountthe yoke ,6, and when the arm 12 has moved to ed. As illustrated in Figure 2, two units are final braking position it will bei'stopped by the 40 shown operable through a common shaft for the upstanding stop-19 and the brake band 17 will 95 l purpose of simultaneously operating two brake thus be held inset, or braking; position until bands one at each end of a drum, however a the-braking lever 10 is reversed and a very sim.-,

single unit may be employed as will be obvious ple and efiicient means is .thusprovided for holdfrom the description herein. ing the brake set. I I V Front and rear brackets 3, 4 are provided and There are t up d b Z 20 av- 100 the rods 5, 5 are anchored to said respective ing the adjustable stops21, 21 arranged one on' brackets and spaced apart forming tracks. Slideach side of the brake band and underneath the able on these tracks are the front and rear yok es same 1 so that when the brake band is released 6, 7, each yoke having suitable end bearings it will rest against said stops and be supported which slide on the respective tracks 5. The thereby out of contact with the corresponding 105T numeral 8' designates a common brake shaft brake surface tothe end that when the brake is I mounted to rotate in suitable bearings 9, 9 and released the band will be maintained clear of the i" I fixed to one end of which there is the brake brake surface all of the way around. i I lever 10. There is a connecting link 11- con- The drawing and description disclose what is nected at one end to each front yoke 6 and now consid'er'ed to bee preferred form of the inno: I

'vention by way of illustration on1y,while the broad principle of the invention will be defined by the appended claims: 7 What I claim is:

-1. Brake mechanism including a brake band, adapted'to surround-a brake surfaceQspaced rods forming a track, a pair of yokes on said track stationary anchor to which one end of said brake; band is attached, a yoke movable on said track and connected to the other end of said brake band, a brake shaft, an, arm thereon, a link pivoted at one end to the free end of said arm and pivoted at its other end to said movable yoke, said arm being movable in one direction to release said band and being movable into another position past center to effect the setting of the brake and a stop arranged to limit the movement of said arm in said last mentioned direction whereby the brake will be-maintained set.

3. A brake mechanism including a adapted to surround a brake surface, a track, astationary anchor to which one end of said band is attached, an anchor movableialong said'track to which the other end of the band is attached,

"a'link pivoted at one end to said movable anchor,

a swinging arm whose free end is pivoted to the other-end of said link, means for actuating said arm in one direction to efiect the release of said brake band brake band and in another direction to carry the "free end of the armpast center and to effect the settingof the brake and a stop to limit the movement of said arm in said last mentioned direction 7 whereby the brake will be maintained et.

' LESTER E. HoDGEs. 

